DESIGN AND IN VITRO CHARACTERIZATION OF MUCOADHESIVE BUCCAL PATCHES OF DULOXETINE HYDROCHLORIDE
Objective: Buccal mucosa is a potential site for the delivery of drugs to the systemic circulation, a drug administered through the buccal mucosa enters directly to the systemic circulation, thereby which bypass the drug from the ï¬rst-pass hepatic metabolism and adverse gastrointestinal effect. Duloxetine hydrochloride (DLX HCL) is a selective serotonin and noradrenaline reuptake inhibitor (SSNRI). It is used in the treatment of depression, diabetic peripheral neuropathic pain and in moderate to severe stress urinary incontinence in women.
However, it undergoes extensive first-pass metabolism, and it is susceptible to undergo degradation in the acidic environment of the stomach, which results in the poor bioavailability. The objective of the present investigation is to design and evaluate the mucoadhesive buccal patches of DLX HCL with a goal of to increase the bioavailability and improve the patient compliance.
Methods: Mucoadhesive buccal patches were prepared by solvent casting technique using mucoadhesive polymers. The patches were evaluated for weight variation, thickness, surface pH, folding endurance, moisture absorption, drug content uniformity, in vitro drug release, mechanical properties and ex vivo permeation studies.
Results: The results of the optimised buccal patch F4 indicate that the mucoadhesive buccal patches of duloxetine hydrochloride may be a good choice for improving the bioavailability by bypassing the extensive first pass metabolism and acid degradation in the stomach.
Conclusion: Duloxetine hydrochloride can be delivered through the buccal route of drug administration through the buccal patches.
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